| 1 | // RUN: %clang -fsanitize=implicit-unsigned-integer-truncation %s -o %t && %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK |
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| 2 | |
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| 3 | #include <stdint.h> |
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| 4 | |
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| 5 | int main() { |
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| 6 | // CHECK-NOT: implicit-conversion |
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| 7 | |
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| 8 | // Negative tests. Even if they produce unexpected results, this sanitizer does not care. |
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| 9 | int8_t n0 = (~((uint32_t)(0))); // ~0 -> -1, but do not warn. |
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| 10 | uint8_t n2 = 128; |
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| 11 | uint8_t n3 = 255; |
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| 12 | // Bools do not count |
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| 13 | _Bool b0 = (~((uint32_t)(0))); |
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| 14 | _Bool b1 = 255; |
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| 15 | |
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| 16 | // Explicit and-ing of bits will silence it. |
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| 17 | uint8_t nc0 = ((~((uint32_t)(0))) & 255); |
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| 18 | |
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| 19 | // Positive tests. |
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| 20 | uint8_t t0 = (~((uint32_t)(0))); |
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| 21 | // CHECK: implicit-conversion by 0x{{[[:xdigit:]]+$}} |
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| 22 | // CHECK-NOT: implicit-conversion |
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| 23 | |
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| 24 | return 0; |
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| 25 | } |
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| 26 | |
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